Hose construction, coupling therefor and methods of making the same

ABSTRACT

A hose construction, coupling therefor and methods of making the same are provided, the hose construction comprising a tubular hose and a coupling secured to one end of the tubular hose, the inner peripheral surface of the tubular hose comprising an inner corrugated lose made of polymeric material and having inwardly convex projections with recesses therebetween and extending from one end of the tubular hose to the other end thereof, the coupling having an insert disposed in the one end of the tubular hose and being radially outwardly expanded into sealing relation with the inner corrugated hose, the insert having an outer peripheral surface defined by a plurality of outwardly convex projections with recesses therebetween, the projections of the insert being respectively received in the recesses of the inner hose and the projections of the inner hose being respectively received in the recesses of the insert whereby the interior of the tubular hose is substantially sealed to the interior of the coupling.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a divisional patent application of its parent patentapplication, Ser. No. 149,585, filed Nov. 9, 1993, now U.S. Pat. No.5,380,050, which, in turn, is a divisional patent application of itsparent patent application, Ser. No. 988,983, filed Dec. 11, 1992, nowU.S. Pat. No. 5,297,822, which, in turn, is a divisional patentapplication of its parent patent application, Ser. No. 875,865, filedApr. 29, 1992, now U.S. Pat. No. 5,199,752, which, in turn, is adivisional patent application of its parent patent application Ser. No.693,109, filed Apr. 25, 1991, now U.S. Pat. No. 5,129,686, which, inturn, is a divisional patent application of its parent patentapplication, Ser. No. 408,161, filed Sep. 15, 1989, now U.S. Pat. No.5,037,143.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a new hose construction and to a new couplingtherefor as well as to a new method of making such a hose constructionand a new method of making such a coupling.

2. Prior Art Statement

It is known to provide a hose construction comprising a tubular hosehaving an inner peripheral surface means and an outer peripheral surfacemeans, and a coupling secured to one end of the tubular hose. Forexample, see the U.S. patent to Wright, No. 4,400,022 and the U.S.patent to Draudt et al, No. 4,625,998.

It is also known to radially outwardly expand a metallic sleeve in ahose after such sleeve has been inserted into one end of the hose. Forexample, see the U.S. patent to Vanderhoof, No. 3,072,174 and the U.S.patent to Delahunty, No. 3,557,434.

SUMMARY OF THE INVENTION

It is one feature of this invention to provide a new hose constructionwherein a tubular hose having an inner corrugated hose made of polymericmaterial and having inwardly convex projections with recessestherebetween and extending from one end of the hose to the other endthereof is uniquely coupled to a coupling so that the interior of thetubular hose is substantially sealed to the interior of the coupling.

In particular, it was found according to the teachings of this inventionthat the coupling can have a unique insert means provided with an outerperipheral surface means that is defined by a plurality of outwardlyconvex projections with recesses therebetween and can be radiallyoutwardly expanded into sealing relation with the inner corrugated hosein such a manner that the projections of the insert means arerespectively received in the recesses of the inner hose and theprojections of the inner hose are respectively received in the recessesof the insert means so that the interior of the tubular hose issubstantially sealed to the interior of the coupling.

For example, one embodiment of this invention provides a hoseconstruction comprising a tubular hose having an inner peripheralsurface means and an outer peripheral surface means, and a couplingsecured to one end of the tubular hose, the inner peripheral surfacemeans of the tubular hose comprising an inner corrugated hose made ofpolymeric material and having inwardly convex projections with recessestherebetween and extending from one end of the tubular hose to the otherend thereof, the coupling having an insert means disposed in the one endof the tubular hose and being radially outwardly expanded into sealingrelation with the inner corrugated hose, the insert means having anouter peripheral surface means defined by a plurality of outwardlyconvex projections with recesses therebetween, the projections of theinsert means being respectively received in the recesses of the innerhose and the projections of the inner hose being respectively receivedin the recesses of the insert means whereby the interior of the tubularhose is substantially sealed to the interior of the coupling.

Accordingly, it is an object of this invention to provide a new hoseconstruction having one or more of the novel features of this inventionas set forth above or hereinafter shown or described.

Another object of this invention is to provide a new method of makingsuch a hose construction, the method of this invention having one ormore of the novel features of this invention as set forth above orhereinafter shown or described.

Another object of this invention is to provide a new coupling for such ahose construction, the coupling of this invention having one or more ofthe novel features of this invention as set forth above or hereinaftershown or described.

Another object of this invention is to provide a new method of makingsuch a coupling, the method of this invention having one or more of thenovel features of this invention as set forth above or hereinafter shownor described.

Other objects, uses and advantages of this invention are apparent from areading of this description which proceeds with reference to theaccompanying drawings forming a part thereof and wherein:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a fragmentary perspective view of the new hose construction ofthis invention.

FIG. 2 is a reduced fragmentary view illustrating how three hoseconstructions of FIG. 1 can be coupled together by a T-shaped couplingmember.

FIG. 3 is an enlarged fragmentary view, partially in cross section,illustrating how one of the hose constructions of FIG. 2 is coupled toone of the nipples of the T-shaped coupler of FIG. 2.

FIG. 4 is a view similar to FIG. 3 and illustrates how one of thenipples of the T-shaped coupler of FIG. 2 can be closed off by an endcap.

FIG. 5 is an enlarged fragmentary cross-sectional view that is takensubstantially in the direction of the arrows 5--5 of FIG. 1 andillustrates the construction of the hose of the hose construction ofFIG. 1.

FIG. 6 is an exploded cross-sectional view illustrating the variousparts of the coupling of the hose construction of FIG. 1.

FIG. 7 is a view similar to FIG. 6 and illustrates the parts of FIG. 6in the assembled relation thereof and before such assembled parts havebeen secured together.

FIG. 8 is a view similar to FIG. 7 and illustrates how the assembledparts of FIG. 7 are fastened together.

FIG. 9 is an exploded view, partially in cross section, and illustrateshow a part of the insert means of the coupling of this invention is tobe disposed in one end of the hose for forming the hose construction ofFIG. 1.

FIG. 10 is a fragmentary view, partially in cross section, andillustrates how the coupling member is to be assembled to thearrangement of FIG. 9.

FIG. 11 is a view similar to FIG. 10 and illustrates the coupling ofFIG. 10 having been telescoped with the end of the hose of FIG. 10.

FIG. 12 is a view similar to FIG. 11 and illustrates how the insertmeans of the coupling is radially outwardly expanded into its sealingrelation with the hose of FIG. 11 to complete the hose construction ofFIG. 1.

FIG. 13 is a view similar to FIG. 10 and illustrates another hoseconstruction of this invention.

FIG. 14 is a view similar to FIG. 13 and illustrates how the coupling ofFIG. 13 is telescoped with the end of the hose of FIG. 13.

FIG. 15 is a view similar to FIG. 14 and illustrates the insert means ofthe coupling being radially outwardly expanded into sealing relationwith the hose of FIG. 14 to complete the hose construction of thisinvention.

FIG. 16 is a view similar to FIG. 13 and illustrates another hoseconstruction of this invention.

FIG. 17 is a view similar to FIG. 16 and illustrates the coupling ofFIG. 16 telescoped with the end of the hose of FIG. 16.

FIG. 18 is a view similar to FIG. 17 and illustrates the insert means ofthe coupling of FIG. 17 having been radially outwardly expanded intosealing relation with the hose of FIG. 17 to complete the hoseconstruction of this invention.

FIG. 19 is a view similar to FIG. 16 and illustrates another hoseconstruction of this invention.

FIG. 20 is a view similar to FIG. 19 and illustrates the coupling ofFIG. 19 telescoped with the end of the hose of FIG. 19.

FIG. 21 is a view similar to FIG. 20 and illustrates the insert means ofthe coupling of FIG. 20 having been radially outwardly expanded intosealing relation with the hose of FIG. 20 to complete the hoseconstruction of this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

While the various features of this invention are hereinafter illustratedand described as being particularly adapted to provide a hoseconstruction for conveying gasoline and like volatile liquidstherethrough, it is to be understood that the various features of thisinvention can be utilized singly or in various combinations thereof toprovide a hose construction for conveying other fluid therethrough forother types of apparatus as desired.

Therefore, this invention is not to be limited to only the embodimentsillustrated in the drawings, because the drawings are merely utilized toillustrate one of the wide variety of uses of this invention.

Referring now to FIG. 1, the new hose construction of this invention isgenerally indicated by the reference numeral 30 and comprises a tubularhose 31 and a coupling 32 secured to one end 33 (FIGS. 9 and 10) of thehose 31 in a manner hereinafter set forth. Of course, a like coupling 32or any other suitable structure can be secured to the other end (notshown) of the hose 31, if desired.

As previously set forth, one of the features of this invention is touniquely interconnect the coupling 32 of this invention to the hose 31so as to provide for a fluid sealed relation between the interiorsthereof. Such unique means for providing such sealed relation isnecessitated by the unique construction of the hose 31. However, theunique construction of the hose 31 comprises the invention of others andis set forth in the copending patent application, Ser. No. 405,487,filed Sep. 11, 1989.

Therefore, only the details of the hose 31 will now be set forth thatare believed to be necessary to understand the features of thisinvention in forming the hose construction 30 of this invention with theunderstanding that the unique features of the hose 31 per se are beingclaimed in the aforementioned copending patent application.

As illustrated in FIG. 5, the hose 31 comprises an inner corrugated hose34 formed of any suitable polymeric material and having a plurality ofoutwardly convex projections 35 with recesses 36 therebetween andextending from one end 37 to the other end 38 thereof, a tube 39 of anysuitable polymeric material and extending in a generally straight linemanner from projection 35 to projection 35 as illustrated in FIG. 5, anouter sleeve 40 of any suitable reinforcing material disposed intelescoped relation on the tube 39, and an outer layer 41 of anysuitable polymeric material that will provide a protection for thesleeve 40 of reinforcing material and also to tend to prevent any liquidthat is conveyed through the flexible hose 31 from permeating to theexterior thereof, such as gasoline or the like.

While the inner hose 34 of the hose 31 can be formed of any suitablematerial and in any suitable manner, one working embodiment thereofcomprises thermoplastic material that is blow molded in a conventionalmanner into the configuration illustrated in FIG. 5 wherein theoutwardly directed convolutions or projections 35 are annular and areuniformly spaced from each other throughout the length of the hose 31 orcan be disposed in a helical manner throughout the length of the hose asrepresented by the projections 35C in FIGS. 19-21 wherein the inner hose34C is made in a conventional manner by spirally winding in overlappingrelation a strip that has the projections 35C and recesses 36C formedtherein in any suitable manner and forming a helically disposed seamthroughout the length of the inner hose 34C.

In any event, the thermoplastic material of the inner hose 34 or 34C ischosen based on the chemical and thermal resistance requirements of theapplication of the hose construction 30 and based on a means to bond thecorrugated inner hose 34 or 34C to the subsequently disposed layersthereon. Thus, the inner hose 34 or 34C can comprise a single layer ofhomogeneous thermoplastic material as illustrated in the drawings or thesame can comprise an inner layer of one type of thermoplastic materialand an outer layer of another type of thermoplastic material as it iswell known that two different plastic materials can be extruded togetherto form a tubular member having one material forming the outer surfacethereof and the other forming the inner surface thereof and thereaftersuch tubular member can be blow molded to form the same into acorrugated tubular member.

In any event, the tube 39 of polymeric material can be applied over theinner hose 34 either as a continuous tube by conventional extrudingapparatus whereby the exuding tube 39 bonds by the nature thereof to theapexes of the projections 35 in the substantially straight line mannerillustrated in FIG. 5 or the tube 39 can be formed by helically wrappinga strip onto the inner tube 34. In any event, the tube 39 provides asmooth surface over the convolutions 35 and provides a consistent basefor receiving the reinforcement 40 thereon. The material of the tube 39is chosen so that it will adhere to the outer surface of the projections35 of the inner tube 34 so that the layer 39 does not fill the recesses36 of the inner tube 34 because if the layer 39 were to fill therecesses 36, not only would the tube 39 then reduce the desiredflexibility characteristics of the inner hose 34, but also the samewould then allow the reinforcement 40 to enter those recesses 36 tofurther reduce the flexibility of the inner hose 34.

After the outer tube 39 has been applied in place in the mannerpreviously set forth, the reinforcement sleeve 40 of either a braidedtextile material or a metal wire material that is wound in alternatingdirections is disposed over the tube 39 and the amount of reinforcementprovided is dependent upon the working pressure requirements of the hoseconstruction 30.

Thereafter, the outer layer 41 of any suitable polymeric material isapplied over the reinforcement 40, such as by being extruded as acontinuous tube thereof by conventional extruding apparatus, to completethe hose 31, the outer layer 41 providing protection for thereinforcement 40 and readily bonding to the inner tube 39 by exudingthrough the reinforcement 40 so as to hold all of the layers of the hose31 in a bonded condition thereof. Thus, the material of the outer layer41 not only protects the reinforcement 40 from physical or chemicaldamage, but also the cover layer 41 is chosen with consideration to theenvironment and bondability of the other layers of the hose 31. Inaddition, the material 41 can be chosen so as to tend to prevent theliquids flowing through the hose 31 from permeating through the hose 31to the exterior thereof.

In one working embodiment of the hose construction 30 of this invention,the inner hose 34 of the hose 31 is formed of two extruded layers withthe inner layer comprising a thermoplastic material sold by DuPont asZytel ST811HS and with the outer layer thereof comprising athermoplastic material sold by the B. F. Goodrich Company as ESTANE5710F1. Such material is blow molded so as to form the hose 34 with aninside diameter of approximately 1.500 of an inch and with the distancebetween the apexes of the projections 35 being approximately 0.246 of aninch. The thickness of the inner portions of the hose 34 isapproximately 0.045 of an inch while the sidewalls between the innerportions and the apexes of the projections 35 are actually disposed atan angle relative to each other rather than being parallel to each otheras illustrated throughout the drawings with such angle beingapproximately 10° to a true transverse line passing through the innerhose 34. The tube 39 comprises the thermoplastic material ESTANE 5710F1and is approximately 0.040 of an inch thick while the reinforcement 40comprises a polyester yarn formed on a thirty-six carrier braidingmachine with two ends per carrier and the outer layer 41 comprises thethermoplastic material ESTANE 5710F1 and is approximately 0.060 of aninch thick.

It is to be understood that the above example of one working embodimentof the hose 31 is not to be a limitation on this invention.Nevertheless, it can be seen that the resulting interior peripheralsurface means 34' of the hose 31 is defined by the inwardly convexprojections 35' with the recesses 36' therebetween and thereby requiresunique means to seal to the same.

The coupling 32 of this invention for sealing to the inner peripheralsurface means 34' of the hose 31 is formed of any suitable metallicmaterial and comprises a tubular body member 42 having a hexagonalnut-like portion 43 disposed intermediate two annular recesses 44 and 45thereof and into which ends 47 and 48 of a rotatable nut 49 and outersleeve 50 are radially inwardly deformed in the manner illustrated inFIG. 8, the nut 49 being rotatable relative to the body member 42 whilethe outer sleeve 50 is interconnected to the body member 42 insubstantially a nonrotatable manner therewith.

An inner sleeve 51 of the coupling 32 has one end 52 thereof secured inan internal annular recess 53 of the body member 42, such as by brazingor the like, so that the other end 54 of the sleeve 51 projects out ofan end 55 of the body member 42, the sleeve 51 having a substantiallysmooth internal peripheral surface means 55' and a corrugated externalperipheral surface means 56 defined by a plurality of outwardly bluntprojections 58 with recesses 59 therebetween. The projections 58 andrecesses 59 are annular but could be helically formed, if desired.

The sleeve 51 is formed of a metallic material that readily permits thesame to be radially outwardly expanded from the condition illustrated inFIG. 8 to the condition illustrated in FIG. 12 whereby the sleeve 51cooperates with a separate part 60 of polymeric material to form aninsert means that is indicated by the reference numeral 61 in FIG. 12 tocooperate with the inner corrugated hose 34 of the hose 31 to sealtherewith as will be apparent hereinafter.

While the coupling 32 can be formed of any suitable material, in oneworking embodiment that couples to the previously set forth workingembodiment of the hose 31 the body member 42 and nut 49 are formed ofbrass while the sleeves 50 and 51 are formed of copper. The end 54 ofthe sleeve 51 has an outside diameter of approximately 1.305 to 1.315 ofan inch in the unexpanded condition thereof as illustrated in FIG. 8 andis approximately 1.700 of an inch in length while having a wallthickness of approximately 0.065 of an inch.

The nut 49 has its end 63 internally threaded at 64 so as to couple thecoupling 32 to any desired structure.

The end 65 of the body part 42 of the coupling 32 is internally flaredat 66 so as to fluidly seal an internal peripheral surface means 67 ofthe coupling 32 to the desired structure.

For example, the nut 49 of a hose construction 30 of this invention canbe coupled to a nipple 68 of a T-shaped metallic coupler 69 by the nut49 threading onto an externally threaded part 70 of the coupler 69 whilethe flared end surface 66 of the body member 42 compacts a copper washer71 against a flared surface 72 of the nipple 68 so as to fluid seal theinterior surface means 67 of the coupler 32 to an internal peripheralsurface means 73 of the coupler 69.

In fact, the coupler 69 comprises a T-member as illustrated in FIG. 2wherein three hose constructions 30 of this invention can be coupled tothe T-member 69 so as to provide an inlet hose construction to theT-connector 69 and two outlet hose constructions 30 leading therefromfor any desired purpose.

While three hose constructions 30 are interconnected to the T-member 69in FIG. 2, it is to be understood that one or more of the nipples 68 ofthe T-coupler 69 could be closed off by a suitable cap means, such ascap means 74 illustrated in FIG. 4 that compacts a washer 71 against thesurface 72 of the nipple 68 to seal closed the nipple 68 as illustrated.

Of course, it is to be understood that the nuts 49 of the hoseconstructions 30 of this invention can couple to other tubular threadedmeans than a T-connector as desired.

The polymeric member 60 for forming the insert means 61 of the coupler32 of this invention with the sleeve 51 has a smooth internal peripheralsurface 76 passing therethrough as illustrated in FIG. 10 while anexterior peripheral surface 77 of the member 60 comprises a plurality ofoutwardly convex projections 78 with recesses 79 therebetween, theprojections 78 and recesses 79 being annular because the same is beingutilized with a hose 31 wherein the inner hose 34 has the inwardlydirected projections 35' thereof al so being formed as annular whereasthe projections 78 of the member 60 could be helically disposed if theinner hose 34 had the projections 35' thereof disposed helically asprovided by such projections 35'C in FIGS. 19-21 and hereinafterdescribed.

In any event, one working embodiment of the member 60 for the previouslyset forth one working embodiment of the hose 31 has four annularprojections 78 with the apexes thereof defining a diameter ofapproximately 1.810 inches and being spaced from each otherapproximately 0.246 of an inch. The apexes of the projections 78 aredefined by a radius of approximately 0.030 of an inch with the sidewallsthereof being angled approximately 4° to a true transverse line passingthrough the member 60 and with the internal peripheral surface means 76defining a diameter of approximately 1.440 inches. The overall length ofthe member 60 is approximately 0.984 of an inch. In such workingembodiment of the member 60, the same is molded from a thermoplasticmaterial sold as Morthane PS498-500 by the Morton Thiokol Company.

In this manner, it can be seen that the member 60 is adapted to bereadily inserted within the end 33 of the hose 31 in the mannerillustrated in FIG. 10 so that the projections 78 of the member 60 arepartially received in the recesses 36' of the inner hose 34 while theprojections 35' of the inner hose 34 are partially received in therecesses 79 of the member 60, such insertion being permitted by therelative flexible nature of the member 60 and the projections 25' of theinner hose 34.

Thereafter, the coupling 32 as illustrated in FIG. 10 is telescoped withthe end 33 of the hose 31 so that the sleeve 51 is disposed inside ofthe member 60 and the outer sleeve 50 is disposed over the end 33 of thehose 31 in the manner illustrated in FIG. 11.

Thereafter, the inner sleeve 51 is outwardly radially expanded asprovided by the arrows 80 in FIG. 12 and in a manner well known in theart, such as set forth in the aforementioned U.S. patent to Vanderhoof,No. 3,072,174 and the U.S. patent to Delahunty, No. 3,557,434 which arebeing incorporated into this disclosure by this reference thereto, tonot only cause the projections 58 of the sleeve 51 to deform into theinternal peripheral surface 76 of the member 60 to form recesses 58'therein and to cause projections 59' of the member 60 to form in therecesses 59 of the sleeve 51 as illustrated in FIG. 12 to firmly fastenthe member 60 onto the sleeve 51, but also to radially outwardly expandthe member 60 and cause the hose end 33 to compact against the outersleeve 50 so that the projections 78 of the member 60 firmly move intothe recesses 36' of the inner hose 34 of the hose 31 and to cause theinward projections 35' of the inner hose 34 of the hose 31 to morefirmly move into the recesses 79 of the member 60 to fluidly seal theinterior or internal surface means 67 of the coupling 32 to the interioror internal surface means 81 of the hose 31 in the manner illustrated inFIG. 12 so as to prevent any fluid leakage therebetween even though avolatile liquid, such as gasoline or the like, is being conveyed throughthe interior of the hose construction 30.

It is believed that this unique sealing effect is caused by the factthat the projections 35' of the inner hose 34 can readily be shaped intosealing relation with the recesses 79 of the member 60 because of thevoids 36 in the inner hose 34 between the projections 35' thereof.

Thus, the radially outwardly expanded sleeve 51 causes the member 60 toform thereon and thereby define the external peripheral surface means ofthe insert 61 that forms into the inner hose 34 of the hose 31 as wellas to fasten the end of the hose 31 in compressed relation between thesleeves 51 and 50 as illustrated in FIG. 12 to securely fasten the hose31 to the coupling 32.

Therefore, it can be seen that the coupling 32 is readily fastened tothe hose 31 by the method of this invention through the insert means 61of the coupling 32 which also fluidly seals the coupling 32 to the hose31 by the method of this invention as Previously set forth.

while the hose construction 30 previously described has the member 60being separate from the coupling 32 until after the sleeve 51 has beenradially outwardly expanded in the manner previously set forth, it is tobe understood that the member 60 could comprise part of the coupling 32before the sleeve 51 is radially outwardly expanded.

In particular, another hose construction of this invention is generallyindicated by the reference number 30A in FIGS. 13-15 and parts thereofsimilar to the hose construction 30 previously set forth are indicatedby like reference numerals followed by the reference letter "A".

As illustrated in FIGS. 13-15, the hose construction 30A issubstantially the same as the hose construction 30 previously describedexcept that the coupling 32A has the member 60A initially molded on thesleeve 51A as illustrated in FIG. 13 so that the member 60A has itsinternal peripheral surface 76A provided with a plurality of inwardlydirected annular projections 59'A received within the annular recesses59A of the sleeve 51A while the annular projections 58A of the sleeve51A are received in annular recesses 58'A of the member 60A so that themember 60A is securely fastened to the sleeve 51A.

The external peripheral surface 77A of the member 60A has a plurality ofoutwardly directed convex projections 78A with recesses 79Atherebetween.

In one working embodiment of the member 60A that cooperates with the oneworking embodiment of the hose 31 previously set forth, the projections78A have the apexes thereof defining a diameter of approximately 1.510inches, are spaced apart approximately 0.242 of an inch and are definedon a radius of approximately 0.050 of an inch while the recesses 79Athereof are defined on a radius of approximately 0.070 of an inch sothat substantially straight tangent sections connect the radiuses of therecesses 79A and projections 78A together in the smooth manner asillustrated.

It can readily be seen that the coupling 32A of FIG. 13 is adapted to betelescoped with the end 33A of the hose 31A and then the insert means61A is adapted to be radially outwardly expanded in the mannerillustrated in FIG. 15 as indicated by the arrows 80A whereby theprojections 78A are received in the recesses 36'A of the inner hose 34Awhile the projections 35'A of the inner hose 34A are received in therecesses 79A of the insert means 61A to completely fluid seal theinterior of the hose 31A to the interior of the coupling 32A aspreviously set forth.

While the hose constructions 30 and 30A previously described each has apolymeric part forming the insert means 61 or 61A thereof, it is to beunderstood that the metallic sleeve of the coupling itself could becorrugated to perform the sealing function thereof.

For example, reference is now made to FIGS. 16-18 wherein another hoseconstruction of this invention is generally indicated by the referencenumeral 30B and parts thereof similar to the hose constructions 30 and30A are indicated by like reference numerals followed by the referenceletter "B".

As illustrated in FIGS. 16-18, the sleeve 51B of the coupling 32B iscorrugated to define a plurality of outwardly convex projections 78Bhaving recesses 79B provided therebetween and being of a size similar tothe member 60A previously described so that when the coupling 32B issubsequently inserted in a telescoping manner with the end 33B of thehose 31B as illustrated in FIG. 17, the sleeve 51B can be radiallyoutwardly expanded in the manner illustrated by the arrows 80B in FIG.18 to place the projections 78B into the recesses 36'B of the inner hose34B while the projections 35'B of the inner hose 34B are received in therecesses 79B to fluid seal the interior of the hose 31B to the interiorof the coupling 32B as previously set forth.

As previously stated, while the various projections and recesses of thehose constructions have all been described as being annular, it is to beunderstood that in the various embodiments of the hose constructions ofthis invention, the recesses and projections thereof could be helicallydisposed in a manner similar to the hose construction 30C of FIGS. 19-21which will now be described.

It can be seen in FIGS. 19-21 that the hose construction 30C issubstantially the same as the hose construction 30A previously describedexcept that the projections 35'C and recesses 36'C of the inner hose 34Cof the tubular hose 31C are helically disposed and the projections 78Cand recesses 79C on the member 60C of the coupling 32C are likewisedisposed at the same helical angle relative to the longitudinal axis ofthe resulting hose construction 30C so that the end 33C of the hose 31Ccan be initially telescoped with the coupling 32C by either directlyinserting the end 33C of the hose 31C into the coupling 32C asillustrated in FIG. 20 or by actually threading the end 33C of the hose31C thereon through rotational movement of the hose 31C as desired.

In any event, it can be seen that once the coupling 32C and the hose 31Care fully telescoped together in the manner illustrated in FIG. 20, theinsert means 31C can be radially outwardly expanded in the mannerillustrated in FIG. 21 by the arrows 80C to sealingly place theprojections 78C of the insert means 61C into the recesses 36'C of theinner hose 34C while the projections 35'C of the inner hose 34C aredisposed in the recesses 79C of the insert means 61C to fluid seal theinterior of the hose 31C to the interior of the coupling 32C aspreviously set forth.

Therefore, it can be seen that this invention not only provides a newhose construction and a new method of making the same, but also thisinvention provides a new coupling for such a hose construction and a newmethod of making such a coupling.

While the forms and methods of this invention now preferred have beenillustrated and described as required by the Patent Statute, it is to beunderstood that other forms and method steps can be utilized and stillfall within the scope of the appended claims wherein each claim setsforth what is believed to be known in each claim prior to this inventionin the portion of each claim that is disposed before the terms "theimprovement" and sets forth what is believed to be new in each claimaccording to this invention in the portion of each claim that isdisposed after the terms "the improvement" whereby it is believed thateach claim sets forth a novel, useful and unobvious invention within thepurview of the Patent Statute.

What is claimed is:
 1. In a hose construction comprising a tubular hosehaving an inner peripheral surface means and an outer peripheral surfacemeans, and a coupling secured to one end of said tubular hose, theimprovement wherein said inner peripheral surface means of said tubularhose comprises an inner corrugated hose made of polymeric material andhaving inwardly directed projections with recesses therebetween andextending from said one end of said tubular hose to the other endthereof and wherein said coupling has an insert means disposed in saidone end of said tubular hose and being radially outwardly expanded intosealing relation with said inner corrugated hose, said insert meanshaving an outer peripheral surface means defined by a plurality ofoutwardly directed projections with recesses therebetween, saidprojections of said insert means being respectively received in saidrecesses of said inner hose and said projections of said inner hosebeing respectively received in said recesses of said insert meanswhereby the interior of said tubular hose is substantially sealed to theinterior of said coupling, said projections of said insert means eachhaving a transverse cross-sectional configuration of a certain lengththat is different from the transverse cross-sectional length of each ofsaid recesses of said inner hose., said insert means comprising atubular metallic sleeve that has a metallic outer surface that is shapedto define said outer peripheral surface means thereof.
 2. A hoseconstruction as set forth in claim 1 wherein said projections of saidinner hose and said insert means are respectively annular and arerespectively disposed substantially transverse to the longitudinal axisof said hose construction.
 3. A hose construction as set forth in claim1 wherein said tubular hose has an outer peripheral surface means, saidcoupling having an outer metallic tubular member telescopically disposedover said tubular hose and being engaged by said outer peripheralsurface means of said tubular hose.
 4. A hose construction as set forthin claim 1 wherein said coupling has a rotatable nut means for fluidlycoupling said hose construction to other structure.
 5. In a method ofmaking a hose construction comprising the steps of forming a tubularhose having an inner peripheral surface means and an outer peripheralsurface means, and securing a coupling to one end of said tubular hose,the improvement comprising the steps of forming said inner peripheralsurface means of said tubular hose to comprise an inner corrugated hosemade of polymeric material and having inwardly directed projections withrecesses therebetween and extending from said one end of said tubularhose to the other end thereof, forming said coupling to have an insertmeans disposed in said one end of said tubular hose and being radiallyoutwardly expanded into sealing relation with said inner corrugatedhose, forming said insert means to have an outer peripheral surfacemeans defined by a plurality of outwardly directed projections withrecesses therebetween, forming said projections of said insert means tobe respectively received in said recesses of said inner hose and saidprojections of said inner hose to be respectively received in saidrecesses of said insert means whereby the interior of said tubular hoseis substantially sealed to the interior of said coupling, forming eachsaid projection of said insert means to have a transversecross-sectional configuration of a certain length that is different fromthe transverse cross-sectional length of each of said recesses of saidinner hose, and forming said insert means to comprise a tubular metallicsleeve that has a metallic outer surface that is shaped to define saidouter peripheral surface means thereof.
 6. A method of making a hoseconstruction as set forth in claim 5 and including the step of formingsaid projections of said inner hose and said insert means to berespectively annular and to be respectively disposed substantiallytransverse to the longitudinal axis of said hose construction.
 7. Amethod of making a hose construction as set forth in claim 5 andincluding the steps of forming said tubular hose to have an outerperipheral surface means and forming said coupling to have an outermetallic tubular member telescopically disposed over said tubular hoseand be engaged by said outer peripheral surface means of said tubularhose.
 8. A method of making a hose construction as set forth in claim 5and including the step of forming said coupling to have a rotatable nutmeans for fluidly coupling said hose construction to other structure.